by JPCass » Fri Aug 31, 2018 7:22 pm
It depends on just how much polishing it needs.
Nevr-Dull magic wadding, or the Cape Cod brand equivalent, is usually a good place to start. It tends to dissolve various surface crud as well as to polish, though it can leave light scratching on fine surfaces that may have to be worked out with another pass with a finer polish. Always try an inconspicuous area first, and see how it's working.
Simichrome is a relatively fine polish paste used in automotive and other applications, and should be fine enough for any slot machine work, though it may be too fine for some applications. I find it very easy to work using cotton cosmetic pads available at drug stores.
If what you're doing requires more than that, then you're into the complexity of finding the right combination of buffing pads and compounds to do the job.
Also, always polish in a circular motion or in different directions, as much as possible.
Restored Mills 5c Extraordinary "barn find", long gone - now restoring 1934 5c Extraordinary Gold Award with original World's Fair reel strips
Restoring early Mills 5c Firebird (large coin view window)
About to take on a Mills 5c Vest Pocket